b) Alternatively, each ton of dry switchgrass could be used directly to generate electricity, and this electricity could in turn be used to operate an EV. Assume that a biomass-fueled power plant has a first-law efficiency of 28%. There is a 7.5% loss for transmission and distribution of electricity from the power plant to the car charging station. The motor plus battery is 88% efficient in converting electrical energy delivered from the charging station to mechanical work. With what efficiency is biomass energy delivered to the wheels in this EVICE car? [5 points] c) According to the above analysis regarding these two uses of biomass for transportation, if we are concerned about utilizing biomass resources most energy efficiently, should we use biomass to generate electricity or should we use it to produce liquid fuels? While this analysis is useful and illustrative, many important factors are left out. Explain two shortcomings of this simplified analysis. [5 points] d) Assume switchgrass is used to produce ethanol for use in 100% ethanol-fueled vehicles. How much land (in km2) would be required for switchgrass production to provide enough ethanol to meet the fuel demand of all cars the United States? Assume 264 million cars traveling an average of 13,000 mi/year with an average fuel economy of 24 miles/gallon ethanol. Roughly which US state is this land area comparable to? [5 points]